Index: src/wp-admin/css/edit.css
===================================================================
--- src/wp-admin/css/edit.css	(revision 53041)
+++ src/wp-admin/css/edit.css	(working copy)
@@ -97,6 +97,12 @@
 	color: #646970;
 }
 
+#sample-permalink {
+	display: inline-block;
+	max-width: 100%;
+	word-wrap: break-word;
+}
+
 #edit-slug-box .cancel {
 	margin-right: 10px;
 	padding: 0;